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STMicroelectronics STM32L031K6T3 — Microcontrollers & Processors (MCU / MPU / DSP)
STMicroelectronics

STM32L031K6T3 STMicroelectronics ARM Cortex-M0+ MCU, 32 MHz

MPNSTM32L031K6T3
Active

STMicroelectronics STM32L0 series ARM Cortex-M0+ 32-bit MCU, STM32L031K6T3, 32 MHz, 32KB Flash, 8K x 8 SRAM, 1K x 8 EEPROM, 32-LQFP (7x7 mm), -40°C to 125°C.

$2.5435Ref. price · indicative, final on quote
STM32L031K6T3 datasheet
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Specifications

STM32L031K6T3 Technical Specifications
ParameterValue
SeriesSTM32L0
Mounting typeSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.65V ~ 3.6V
Operating temperature-40°C~125°C(TA)
Speed32MHz
PackageTray
RAM size8K x 8
Core size32-Bit Single-Core
EEPROM size1K x 8
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)26
Core processorARM® Cortex®-M0+
Case32-LQFP
Data convertersA/D 10x12b
Program memory size32KB (32K x 8)

Product details

32 MHz Cortex-M0+ with 32 KB Flash — what it buys the BOM

It also integrates 1K x 8 EEPROM for parameter storage without external parts.

Peripherals and connectivity for sensor/control loops

Connectivity covers I²C, IrDA, LINbus, SPI, and UART/USART, so it interfaces directly with common sensors, displays, and transceivers. The 10-channel 12-bit ADC handles analog inputs like thermistors or potentiometers without an external converter.

Package and footprint — 32-LQFP, 26 I/O

Housed in a 32-LQFP (7x7 mm) package with 26 general-purpose I/O pins, this MCU fits on compact PCBs and is hand-solderable for prototyping. The surface-mount LQFP footprint is standard across the STM32L0 series, so a board layout can be reused with higher-density Flash variants without a respin.

ST lists the STM32L031K6T3 as Active. The base product number STM32L031 covers multiple Flash and package options, giving the BOM some density flexibility without requalification.

Frequently asked questions

What is the maximum operating temperature of STM32L031K6T3?

This extended range suits it for industrial, automotive under-hood, and outdoor equipment where standard commercial-grade parts would not survive.

What is the maximum clock speed of STM32L031K6T3?

The core runs at 32 MHz maximum. At that speed the Cortex-M0+ executes most single-cycle instructions, giving enough throughput for real-time control loops, sensor polling, and communication protocol handling without needing a higher-power Cortex-M3 or M4.

What is the closest pin-compatible alternative to STM32L031K6T3 in this component family?

Within the STM32L0 series, the STM32L031K6T3 shares its 32-LQFP footprint and pinout with other STM32L031x6 variants. The main difference is Flash and RAM density — the STM32L031K6T3 sits at 32 KB Flash / 8K x 8 SRAM. Higher-density siblings in the same package (e.g., STM32L031K8T3 with 64 KB Flash) are pin-compatible drop-in upgrades if firmware grows. No official second-source from another manufacturer exists; ST is the sole foundry.